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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License
     15  */
     16 
     17 package com.android.tv.settings;
     18 
     19 import android.app.Activity;
     20 import android.app.Fragment;
     21 import android.content.SharedPreferences;
     22 import android.os.Bundle;
     23 import android.support.annotation.Nullable;
     24 import android.transition.Scene;
     25 import android.transition.Slide;
     26 import android.transition.Transition;
     27 import android.transition.TransitionManager;
     28 import android.util.Log;
     29 import android.view.Gravity;
     30 import android.view.ViewGroup;
     31 import android.view.ViewTreeObserver;
     32 
     33 import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
     34 import com.android.settingslib.core.instrumentation.SharedPreferencesLogger;
     35 
     36 public abstract class TvSettingsActivity extends Activity {
     37     private static final String TAG = "TvSettingsActivity";
     38 
     39     private static final String SETTINGS_FRAGMENT_TAG =
     40             "com.android.tv.settings.MainSettings.SETTINGS_FRAGMENT";
     41 
     42     @Override
     43     protected void onCreate(@Nullable Bundle savedInstanceState) {
     44         super.onCreate(savedInstanceState);
     45         if (savedInstanceState == null) {
     46 
     47             final ViewGroup root = findViewById(android.R.id.content);
     48             root.getViewTreeObserver().addOnPreDrawListener(
     49                     new ViewTreeObserver.OnPreDrawListener() {
     50                         @Override
     51                         public boolean onPreDraw() {
     52                             root.getViewTreeObserver().removeOnPreDrawListener(this);
     53                             final Scene scene = new Scene(root);
     54                             scene.setEnterAction(() -> {
     55                                 if (getFragmentManager().isStateSaved()
     56                                         || getFragmentManager().isDestroyed()) {
     57                                     Log.d(TAG, "Got torn down before adding fragment");
     58                                     return;
     59                                 }
     60                                 final Fragment fragment = createSettingsFragment();
     61                                 if (fragment != null) {
     62                                     getFragmentManager().beginTransaction()
     63                                             .add(android.R.id.content, fragment,
     64                                                     SETTINGS_FRAGMENT_TAG)
     65                                             .commitNow();
     66                                 }
     67                             });
     68 
     69                             final Slide slide = new Slide(Gravity.END);
     70                             slide.setSlideFraction(
     71                                     getResources().getDimension(R.dimen.lb_settings_pane_width)
     72                                             / root.getWidth());
     73                             TransitionManager.go(scene, slide);
     74 
     75                             // Skip the current draw, there's nothing in it
     76                             return false;
     77                         }
     78                     });
     79         }
     80     }
     81 
     82     @Override
     83     public void finish() {
     84         final Fragment fragment = getFragmentManager().findFragmentByTag(SETTINGS_FRAGMENT_TAG);
     85         if (isResumed() && fragment != null) {
     86             final ViewGroup root = findViewById(android.R.id.content);
     87             final Scene scene = new Scene(root);
     88             scene.setEnterAction(() -> getFragmentManager().beginTransaction()
     89                     .remove(fragment)
     90                     .commitNow());
     91             final Slide slide = new Slide(Gravity.END);
     92             slide.setSlideFraction(
     93                     getResources().getDimension(R.dimen.lb_settings_pane_width) / root.getWidth());
     94             slide.addListener(new Transition.TransitionListener() {
     95                 @Override
     96                 public void onTransitionStart(Transition transition) {
     97                     getWindow().setDimAmount(0);
     98                 }
     99 
    100                 @Override
    101                 public void onTransitionEnd(Transition transition) {
    102                     transition.removeListener(this);
    103                     TvSettingsActivity.super.finish();
    104                 }
    105 
    106                 @Override
    107                 public void onTransitionCancel(Transition transition) {
    108                 }
    109 
    110                 @Override
    111                 public void onTransitionPause(Transition transition) {
    112                 }
    113 
    114                 @Override
    115                 public void onTransitionResume(Transition transition) {
    116                 }
    117             });
    118             TransitionManager.go(scene, slide);
    119         } else {
    120             super.finish();
    121         }
    122     }
    123 
    124     protected abstract Fragment createSettingsFragment();
    125 
    126     private String getMetricsTag() {
    127         String tag = getClass().getName();
    128         if (tag.startsWith("com.android.tv.settings.")) {
    129             tag = tag.replace("com.android.tv.settings.", "");
    130         }
    131         return tag;
    132     }
    133 
    134     @Override
    135     public SharedPreferences getSharedPreferences(String name, int mode) {
    136         if (name.equals(getPackageName() + "_preferences")) {
    137             return new SharedPreferencesLogger(this, getMetricsTag(),
    138                     new MetricsFeatureProvider());
    139         }
    140         return super.getSharedPreferences(name, mode);
    141     }
    142 }
    143